Thats the same Noel Blanchet. I've seen St. Omer, St. Omer de Rosiere, and Rosiere en Santerre given by various sources as the birthplace of Noel's son, Pierre. Rosiere en Santerre is a small town thats near Amiens. Maybe St. Omer is the name of a parish. Noel's wife's name is sometimes given as Madeleine Vallette or Madeleine Valet. Do you have a line from Elizabeth Blanchet to Noel Blanchet traced out? I have one written down somewhere.